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[PATCH 0/4] coresight: Add ETR-PERF polling.

by Daniel Kiss

This series adds a feature to ETR-PERF that sync the ETR buffer to perf periodically. This is really handy when the system wide trace is used because in this case the perf won't sync during the trace. In a per-thread setup the traced program might not go to the kernel frequvently enought to collect trace. Polling helps in both usecases. Can be used with strobing. Tuning polling period is challanging, I'm working on an additional patch that adds some metrics to help tune the polling period. Daniel Kiss (4): coresight: tmc-etr: Advance buffer pointer in sync buffer. coresight: tmc-etr: Track perf handler. coresight: etm-perf: Export etm_event_cpu_path. coresight: Add ETR-PERF polling. .../testing/sysfs-bus-coresight-devices-tmc | 8 + drivers/hwtracing/coresight/Makefile | 2 +- .../hwtracing/coresight/coresight-etm-perf.c | 10 +- .../hwtracing/coresight/coresight-etm-perf.h | 1 + .../coresight/coresight-etr-perf-polling.c | 316 ++++++++++++++++++ .../coresight/coresight-etr-perf-polling.h | 42 +++ .../hwtracing/coresight/coresight-tmc-core.c | 2 + .../hwtracing/coresight/coresight-tmc-etr.c | 22 +- drivers/hwtracing/coresight/coresight-tmc.h | 2 + 9 files changed, 401 insertions(+), 4 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.c create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.h -- 2.25.1

5 years, 5 months

[PATCH] coresight: Propagate symlink failure

by Jeremy Linton

If the symlink is unable to be created, the driver goes ahead and continues device creation. Instead lets propagate the failure, and fail the probe. Signed-off-by: Jeremy Linton <jeremy.linton(a)arm.com> --- drivers/hwtracing/coresight/coresight-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 6c68d34d956e..2dc4b0110442 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1392,7 +1392,7 @@ static int coresight_fixup_device_conns(struct coresight_device *csdev) } } - return 0; + return ret; } static int coresight_remove_match(struct device *dev, void *data) -- 2.31.1

5 years, 5 months

[PATCH] coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()

by Sai Prakash Ranjan

commit 6f755e85c332 ("coresight: Add helper for inserting synchronization packets") removed trailing '\0' from barrier_pkt array and updated the call sites like etb_update_buffer() to have proper checks for barrier_pkt size before read but missed updating tmc_update_etf_buffer() which still reads barrier_pkt past the array size resulting in KASAN out-of-bounds bug. Fix this by adding a check for barrier_pkt size before accessing like it is done in etb_update_buffer(). BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698 Read of size 4 at addr ffffffd05b7d1030 by task perf/2629 Call trace: dump_backtrace+0x0/0x27c show_stack+0x20/0x2c dump_stack+0x11c/0x188 print_address_description+0x3c/0x4a4 __kasan_report+0x140/0x164 kasan_report+0x10/0x18 __asan_report_load4_noabort+0x1c/0x24 tmc_update_etf_buffer+0x4b8/0x698 etm_event_stop+0x248/0x2d8 etm_event_del+0x20/0x2c event_sched_out+0x214/0x6f0 group_sched_out+0xd0/0x270 ctx_sched_out+0x2ec/0x518 __perf_event_task_sched_out+0x4fc/0xe6c __schedule+0x1094/0x16a0 preempt_schedule_irq+0x88/0x170 arm64_preempt_schedule_irq+0xf0/0x18c el1_irq+0xe8/0x180 perf_event_exec+0x4d8/0x56c setup_new_exec+0x204/0x400 load_elf_binary+0x72c/0x18c0 search_binary_handler+0x13c/0x420 load_script+0x500/0x6c4 search_binary_handler+0x13c/0x420 exec_binprm+0x118/0x654 __do_execve_file+0x77c/0xba4 __arm64_compat_sys_execve+0x98/0xac el0_svc_common+0x1f8/0x5e0 el0_svc_compat_handler+0x84/0xb0 el0_svc_compat+0x10/0x50 The buggy address belongs to the variable: barrier_pkt+0x10/0x40 Memory state around the buggy address: ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03 ^ ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ================================================================== Fixes: 6f755e85c332 ("coresight: Add helper for inserting synchronization packets") Cc: stable(a)vger.kernel.org Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan(a)codeaurora.org> --- drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index 45b85edfc690..cd0fb7bfba68 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -530,7 +530,7 @@ static unsigned long tmc_update_etf_buffer(struct coresight_device *csdev, buf_ptr = buf->data_pages[cur] + offset; *buf_ptr = readl_relaxed(drvdata->base + TMC_RRD); - if (lost && *barrier) { + if (lost && i < CORESIGHT_BARRIER_PKT_SIZE) { *buf_ptr = *barrier; barrier++; } -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

5 years, 5 months

📌Re: Custom Clothing

by Daniel Smith

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5 years, 5 months

[PATCH v1 1/1] coresight: core: Switch to krealloc_array()

by Andy Shevchenko

Let the krealloc_array() check for multiplication overflow. Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> --- drivers/hwtracing/coresight/coresight-core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 6c68d34d956e..a7971c68b0be 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1730,9 +1730,9 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict, if (idx < 0) { /* Make space for the new entry */ idx = dict->nr_idx; - list = krealloc(dict->fwnode_list, - (idx + 1) * sizeof(*dict->fwnode_list), - GFP_KERNEL); + list = krealloc_array(dict->fwnode_list, + idx + 1, sizeof(*dict->fwnode_list), + GFP_KERNEL); if (ZERO_OR_NULL_PTR(list)) { idx = -ENOMEM; goto done; -- 2.30.2

5 years, 5 months

[PATCH v3 0/3] perf cs-etm: Handle valid-but-zero timestamps

by James Clark

Changes since v2: * Fix typo in last commit message * Add reviewed-by tags from Leo Yan This patchset applies on top of "[PATCH v3 0/2] perf cs-etm: Set time on synthesised samples to preserve ordering" James Clark (3): perf cs-etm: Move synth_opts initialisation perf cs-etm: Start reading 'Z' --itrace option perf cs-etm: Prevent and warn on underflows during timestamp calculation. .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 45 ++++++++++++++----- tools/perf/util/cs-etm.c | 20 +++++---- 2 files changed, 46 insertions(+), 19 deletions(-) -- 2.28.0

5 years, 5 months

[PATCH v3 03/16] docs: trace: coresight: coresight-etm4x-reference.rst: replace some characters

by Mauro Carvalho Chehab

The conversion tools used during DocBook/LaTeX/html/Markdown->ReST conversion and some cut-and-pasted text contain some characters that aren't easily reachable on standard keyboards and/or could cause troubles when parsed by the documentation build system. Replace the occurences of the following characters: - U+00a0 (' '): NO-BREAK SPACE as it can cause lines being truncated on PDF output Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org> --- Documentation/trace/coresight/coresight-etm4x-reference.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/trace/coresight/coresight-etm4x-reference.rst b/Documentation/trace/coresight/coresight-etm4x-reference.rst index b64d9a9c79df..d25dfe86af9b 100644 --- a/Documentation/trace/coresight/coresight-etm4x-reference.rst +++ b/Documentation/trace/coresight/coresight-etm4x-reference.rst @@ -427,7 +427,7 @@ the ‘TRC’ prefix. :Syntax: ``echo idx > vmid_idx`` - Where idx < numvmidc + Where idx < numvmidc ---- -- 2.31.1

5 years, 6 months

[PATCH v2 0/3] perf cs-etm: Handle valid-but-zero timestamps

by James Clark

This patchset is an alternate solution to the original: "[RFC PATCH] perf cs-etm: Handle valid-but-zero timestamps". It uses the existing Z option to --itrace instead of modifying the behaviour of the cs_etm__etmq_get_timestamp() function. Using timeless mode is equivalent to ignoring 0 timestamps, as suggested by Mike and Leo. It applies on top of "[PATCH v3 0/2] perf cs-etm: Set time on synthesised samples to preserve ordering" James Clark (3): perf cs-etm: Move synth_opts initialisation perf cs-etm: Start reading 'Z' --itrace option perf cs-etm: Prevent and warn on underflows during timestamp calculation. .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 45 ++++++++++++++----- tools/perf/util/cs-etm.c | 20 +++++---- 2 files changed, 46 insertions(+), 19 deletions(-) -- 2.28.0

5 years, 6 months

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5 years, 6 months

[PATCH v2 00/40] Use ASCII subset instead of UTF-8 alternate symbols

by Mauro Carvalho Chehab

This series contain basically a cleanup from all those years of converting files to ReST. During the conversion period, several tools like LaTeX, pandoc, DocBook and some specially-written scripts were used in order to convert existing documents. Such conversion tools - plus some text editor like LibreOffice or similar - have a set of rules that turns some typed ASCII characters into UTF-8 alternatives, for instance converting commas into curly commas and adding non-breakable spaces. All of those are meant to produce better results when the text is displayed in HTML or PDF formats. While it is perfectly fine to use UTF-8 characters in Linux, and specially at the documentation, it is better to stick to the ASCII subset on such particular case, due to a couple of reasons: 1. it makes life easier for tools like grep; 2. they easier to edit with the some commonly used text/source code editors. Also, Sphinx already do such conversion automatically outside literal blocks, as described at: https://docutils.sourceforge.io/docs/user/smartquotes.html In this series, the following UTF-8 symbols are replaced: - U+00a0 (' '): NO-BREAK SPACE - U+00ad (''): SOFT HYPHEN - U+00b4 ('´'): ACUTE ACCENT - U+00d7 ('×'): MULTIPLICATION SIGN - U+2010 ('‐'): HYPHEN - U+2018 ('‘'): LEFT SINGLE QUOTATION MARK - U+2019 ('’'): RIGHT SINGLE QUOTATION MARK - U+201c ('“'): LEFT DOUBLE QUOTATION MARK - U+201d ('”'): RIGHT DOUBLE QUOTATION MARK - U+2212 ('−'): MINUS SIGN - U+2217 ('∗'): ASTERISK OPERATOR - U+feff (''): ZERO WIDTH NO-BREAK SPACE (BOM) --- v2: - removed EM/EN DASH conversion from this patchset; - removed a few fixes, as those were addressed on a separate series. PS.: The first version of this series was posted with a different name: https://lore.kernel.org/lkml/cover.1620641727.git.mchehab+huawei@kernel.org/ I also changed the patch texts, in order to better describe the patches goals. Mauro Carvalho Chehab (40): docs: hwmon: Use ASCII subset instead of UTF-8 alternate symbols docs: admin-guide: Use ASCII subset instead of UTF-8 alternate symbols docs: admin-guide: media: ipu3.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: admin-guide: perf: imx-ddr.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: admin-guide: pm: Use ASCII subset instead of UTF-8 alternate symbols docs: trace: coresight: coresight-etm4x-reference.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: driver-api: ioctl.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: driver-api: thermal: Use ASCII subset instead of UTF-8 alternate symbols docs: driver-api: media: drivers: Use ASCII subset instead of UTF-8 alternate symbols docs: driver-api: firmware: other_interfaces.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: fault-injection: nvme-fault-injection.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: usb: Use ASCII subset instead of UTF-8 alternate symbols docs: process: code-of-conduct.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: userspace-api: media: fdl-appendix.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: userspace-api: media: v4l: Use ASCII subset instead of UTF-8 alternate symbols docs: userspace-api: media: dvb: Use ASCII subset instead of UTF-8 alternate symbols docs: vm: zswap.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: filesystems: f2fs.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: filesystems: ext4: Use ASCII subset instead of UTF-8 alternate symbols docs: kernel-hacking: Use ASCII subset instead of UTF-8 alternate symbols docs: hid: Use ASCII subset instead of UTF-8 alternate symbols docs: security: tpm: tpm_event_log.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: security: keys: trusted-encrypted.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: networking: scaling.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: networking: devlink: devlink-dpipe.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: networking: device_drivers: Use ASCII subset instead of UTF-8 alternate symbols docs: x86: Use ASCII subset instead of UTF-8 alternate symbols docs: scheduler: sched-deadline.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: power: powercap: powercap.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: ABI: Use ASCII subset instead of UTF-8 alternate symbols docs: PCI: acpi-info.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: gpu: Use ASCII subset instead of UTF-8 alternate symbols docs: sound: kernel-api: writing-an-alsa-driver.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: arm64: arm-acpi.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: infiniband: tag_matching.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: misc-devices: ibmvmc.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: firmware-guide: acpi: lpit.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: firmware-guide: acpi: dsd: graph.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: virt: kvm: api.rst: Use ASCII subset instead of UTF-8 alternate symbols docs: RCU: Use ASCII subset instead of UTF-8 alternate symbols ...sfs-class-chromeos-driver-cros-ec-lightbar | 2 +- .../ABI/testing/sysfs-devices-platform-ipmi | 2 +- .../testing/sysfs-devices-platform-trackpoint | 2 +- Documentation/ABI/testing/sysfs-devices-soc | 4 +- Documentation/PCI/acpi-info.rst | 22 +- .../Data-Structures/Data-Structures.rst | 52 ++-- .../Expedited-Grace-Periods.rst | 40 +-- .../Tree-RCU-Memory-Ordering.rst | 10 +- .../RCU/Design/Requirements/Requirements.rst | 122 ++++----- Documentation/admin-guide/media/ipu3.rst | 2 +- Documentation/admin-guide/perf/imx-ddr.rst | 2 +- Documentation/admin-guide/pm/intel_idle.rst | 4 +- Documentation/admin-guide/pm/intel_pstate.rst | 4 +- Documentation/admin-guide/ras.rst | 86 +++--- .../admin-guide/reporting-issues.rst | 2 +- Documentation/arm64/arm-acpi.rst | 8 +- .../driver-api/firmware/other_interfaces.rst | 2 +- Documentation/driver-api/ioctl.rst | 8 +- .../media/drivers/sh_mobile_ceu_camera.rst | 8 +- .../driver-api/media/drivers/zoran.rst | 2 +- .../driver-api/thermal/cpu-idle-cooling.rst | 14 +- .../driver-api/thermal/intel_powerclamp.rst | 6 +- .../thermal/x86_pkg_temperature_thermal.rst | 2 +- .../fault-injection/nvme-fault-injection.rst | 2 +- Documentation/filesystems/ext4/attributes.rst | 20 +- Documentation/filesystems/ext4/bigalloc.rst | 6 +- Documentation/filesystems/ext4/blockgroup.rst | 8 +- Documentation/filesystems/ext4/blocks.rst | 2 +- Documentation/filesystems/ext4/directory.rst | 16 +- Documentation/filesystems/ext4/eainode.rst | 2 +- Documentation/filesystems/ext4/inlinedata.rst | 6 +- Documentation/filesystems/ext4/inodes.rst | 6 +- Documentation/filesystems/ext4/journal.rst | 8 +- Documentation/filesystems/ext4/mmp.rst | 2 +- .../filesystems/ext4/special_inodes.rst | 4 +- Documentation/filesystems/ext4/super.rst | 10 +- Documentation/filesystems/f2fs.rst | 4 +- .../firmware-guide/acpi/dsd/graph.rst | 2 +- Documentation/firmware-guide/acpi/lpit.rst | 2 +- Documentation/gpu/i915.rst | 2 +- Documentation/gpu/komeda-kms.rst | 2 +- Documentation/hid/hid-sensor.rst | 70 ++--- Documentation/hid/intel-ish-hid.rst | 246 +++++++++--------- Documentation/hwmon/ir36021.rst | 2 +- Documentation/hwmon/ltc2992.rst | 2 +- Documentation/hwmon/pm6764tr.rst | 2 +- Documentation/infiniband/tag_matching.rst | 4 +- Documentation/kernel-hacking/hacking.rst | 2 +- Documentation/kernel-hacking/locking.rst | 2 +- Documentation/misc-devices/ibmvmc.rst | 8 +- .../device_drivers/ethernet/intel/i40e.rst | 8 +- .../device_drivers/ethernet/intel/iavf.rst | 4 +- .../device_drivers/ethernet/netronome/nfp.rst | 12 +- .../networking/devlink/devlink-dpipe.rst | 2 +- Documentation/networking/scaling.rst | 18 +- Documentation/power/powercap/powercap.rst | 210 +++++++-------- Documentation/process/code-of-conduct.rst | 2 +- Documentation/scheduler/sched-deadline.rst | 2 +- .../security/keys/trusted-encrypted.rst | 4 +- Documentation/security/tpm/tpm_event_log.rst | 2 +- .../kernel-api/writing-an-alsa-driver.rst | 68 ++--- .../coresight/coresight-etm4x-reference.rst | 16 +- Documentation/usb/ehci.rst | 2 +- Documentation/usb/gadget_printer.rst | 2 +- Documentation/usb/mass-storage.rst | 36 +-- .../media/dvb/audio-set-bypass-mode.rst | 2 +- .../userspace-api/media/dvb/audio.rst | 2 +- .../userspace-api/media/dvb/dmx-fopen.rst | 2 +- .../userspace-api/media/dvb/dmx-fread.rst | 2 +- .../media/dvb/dmx-set-filter.rst | 2 +- .../userspace-api/media/dvb/intro.rst | 6 +- .../userspace-api/media/dvb/video.rst | 2 +- .../userspace-api/media/fdl-appendix.rst | 64 ++--- .../userspace-api/media/v4l/crop.rst | 16 +- .../userspace-api/media/v4l/dev-decoder.rst | 6 +- .../userspace-api/media/v4l/diff-v4l.rst | 2 +- .../userspace-api/media/v4l/open.rst | 2 +- .../media/v4l/vidioc-cropcap.rst | 4 +- Documentation/virt/kvm/api.rst | 28 +- Documentation/vm/zswap.rst | 4 +- Documentation/x86/resctrl.rst | 2 +- Documentation/x86/sgx.rst | 4 +- 82 files changed, 693 insertions(+), 693 deletions(-) -- 2.30.2

5 years, 6 months

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